0.51.0

Deprecations

• [dd-trace-api] Deprecate scope finishOnClose and continuation close #1424
  • Close spans manually instead of relying on finishOnClose
  • Use Continuation.cancel() instead of Continuation.close()

Improvements

• [Performance] Avoid allocation of byte[] in MessagePacker.writeString #1435
• [Performance] Intern UTF8 encoding of well known constants to reduce allocation#1430
• [Performance] Replace collection.size() > 0 with not collection.isEmpty() #1420
• [Performance] Avoid allocating an array when getting first header value #1418
• Add instrumentation for OkHttp 2.2+ #1402 (Thanks @jerchung for the contribution)
• Reduce finalize() logging in tracer #1416
• Change logging for ScopeEventFactory creation exception #1417

Changes

• OpenTracing Split #1354, #1439, #1429
  • Note: Some unchecked casting will no longer be possible
    • Spans passed into TraceInterceptor will no longer be castable to io.opentracing.Span or datadog.opentracing.DDSpan
    • Spans returned from OpenTracing interfaces will no longer be castable to datadog.opentracing.DDSpan
• Do not stop profiling on fatal exceptions #1421
• Upgrade jmxfetch to 0.36.1 and integrations-core modules to 7.19.0 #1410
• Upgrade Byte Buddy to 1.10.10 #1409

Fixes

• Fix projectreactor instrumentation to keep span context connected #1308, #1415
• Add volatile on started boolean in ProfilingSystem #1426
• Netty 3.8 had the wrong version in the config property #1423
• Fix cassandra instrumentation to use a daemon thread #1422
• Add null servlet context check #1414

0.50.0

Improvements

• New instrumentation for Rediscala library #1389 (Thanks @aliyakamercan for the contribution)
• Extend Lettuce instrumentation support to 4.0-5.x sync/async APIs #1398
• Extend Ratpack instrumentation to 1.8 #1404
  • Applications using Ratpack 1.4.x and Guava 19 will no longer be instrumented. A minimum of Guava 20 is now required.

Changes

• Add exception sampling event for profiling #1297
• Resolve conflicts across new DD_VERSION, DD_ENV and DD_TAGS variables #1393

Bug Fixes

• Rework servlet 2 to not wrap HttpServletResponse objects #1387
• Handle AbstractMethodError in JDBC instrumentation if getClientInfo not implemented #1385
• Http Trace and Span ID should use StringCachingBigInteger #1397 (Thanks @aarya123 for the contribution)
• Check jax-rs AsyncResponse for span before starting new one #1403

0.49.0

Improvements

• Capture thread CPU time elapsed in scope #1358
• Detect route at the beginning of Spring requests #1360
• Update versions of statsd client, guava, slf4j, and okhttp dependencies #1379, #1380

Changes

• Remove dd. prefix from env and version tags #1378

Fixes

• Properly handle resource name for nested JAX-RS calls #1377
• Remove extraneous debug logging #1364
• Remove incorrect sample rate being reported #1374
• Make CommonTask tasks more robust #1366

0.48.0

Improvements

• Increased Play support to Play 2.3+ #1325
• Add DD_SITE (and dd.site) configuration option to support sending profiles to different datadog sites (e.g. EU) #1348
• DD_SERVICE; DD_ENV; DD_VERSION config options #1341

Changes

• Rename DD_PROFILING_APIKEY to DD_API_KEY to allow generic use by other parts of the tracer in the future #1355

Fixes

• Make sure that netty exception message is not null #1337
• Remove sensitive information from debug log #1349
• IndexOutOfBoundsException with single comma value #1356

See Milestone for full details.

0.47.0

Improvements

• [Performance] Remove hostname and port from HttpClientDecorator #1316 (thanks @aarya123 )
• Netty 3.8+ instrumentation #1327

Changes

• Revert "Add config to capture stacktrace when a span duration exceeds threshold" #1335

Fixes

• NPE in header extraction #1319

0.46.0

Improvements

• Add commons-httpclient instrumentation #1299
• Capture stacktrace for long running spans #1160
  • this was removed in 0.47.0.
• Avoid jar file collisions with bootstrap injection #1285
• Inject traceId and spanId into servlet request attributes #1304
• [Performance] Ignore popular library classes that are never instrumented #1293. #1303, #1305, #1312
• [Performance] Move common helper classes to bootstrap #1311
• [Performance] Additional ClassLoader matcher improvements #1298

Changes

• Stop creating a "top level" servlet span when in a forward/include situation #1300

Fixes

• Play-WS exception when using stream() #1286
• gRPC scopes never closed #1301

0.45.0

Improvements

• Add setting dd.tags/DD_TAGS to apply tags for traces, metrics, and profiles #1263
• Update jmxfetch to 0.35.0 for various improvements #1281
• Improve application startup time by
  • ignoring evaluation of many classes from common frameworks #1255 #1282
  • reducing duplicate matchers for instrumentation context #1261
  • allow muzzle to return a simple boolean instead of a list #1251
  • add a classloader precheck to various instrumentation #1283

Regression

• Fix regression for applications with non-delegating class loaders introduced in 0.44.0 #1275

Changes

• Use guava cache instead of WeakHashMap to reduce thread contention #1244
• Add LogHandler to provide alternate handling for span.log calls #1225
• Add support for lz4 compression in profiles and make it default #1216
• Reduce uri reparsing #1268
• Allow @Trace generated spans be reported to App Analytics
  • System Property: -Ddd.trace-annotation.analytics.enabled=true
  • Environment Variable: DD_TRACE_ANNOTATION_ANALYTICS_ENABLED=true
    or
  • System Property: -Ddd.trace-config.analytics.enabled=true
  • Environment Variable: DD_TRACE_CONFIG_ANALYTICS_ENABLED=true

Deprecation

• dd.tags should now be used instead of dd.trace.global.tags and DD_TAGS instead of DD_TRACE_GLOBAL_TAGS

For more details see the release milestone

0.44.0

Known Issues

• This release broke classloader delegation config for OSGi based systems (Wildfly, JBoss, etc) (Fixed in #1275/0.45.0)

Improvements

• Add instrumentation for Spring Scheduling #1192
• Add support for Datadog Profiling #1211
• Memory overhead reduction #1226, #1228
• Startup overhead reduction #1231, #1232, #1233, #1235, #1237, #1240, #1245, #1246, #1247, #1248

Changes

• Move service name mappings processing to DDSpanContext #1217
• Disable peer hostname tag for http servers #1224
• Use more generic instrumentation for classloaders (Tomcat, JBoss, OSGi) #1218 (thanks @trask)
• Change DDTracer to return OpenTracing interfaces instead of DD* implementations #1219
• Determine agent URL lazily #1236

Fixes

• Ensure CallDepthThreadLocalMap is always reset #1227 (thanks @trask )
• Fix JaxRs matching #1229
• Fix NPE with elasticsearch 2 #1215 (thanks @liborio7)

0.43.0

Improvements

• Deduplicate class loads, reducing jar size and memory overhead #1199
• Reduce memory overhead by combining a few threads #1200
• Reduce instrumentation class sizes by removing extraneous validation code #1208
• This adds support for the Finatra web framework 2.9+ #1188

Changes

• Remove Jackson dependency in tracing (still used by jmxfetch) #1185
• Upgrade OkHttp client to 3.12.8 #1201
• Reduce ContextClassloader usage #1204
• New trace processing pipeline #1161
  • Adds metric to trace to allow agent to scale counts if sampling occurs

Fixes

• Allow DDSpan.setError to set false #1202 (Thanks @cecile75!)

0.42.0

Improvements

• Allow limiting the depth of a traces scope tree #1177
• Adjust class caching strategy to reduce start-up impact and add bounds for size #1189
• Made decorator properties accept lowercase names #1182
• Reduce memory overhead of loading internal classes and jars #1179
• Add builder on DDTracer class #1174

Changes

• Updating bytebuddy to 1.10.6 #1175
• Changed rules based sampling properties to follow common Datadog convention #1181

Fixes

• Chained servlets by way of forward and include will not create multiple top level spans #1196 (Fixed #1195)
• Fixes potential stack overflow in method tracing property processing #1193 (Thanks to @Blikingor for the contribution)
• In some cases we were causing a NullPointerException in hiberate instrumentation #1190